Rich koch



(No Model.)

H. P. A. FAULHABER & G. F. KOCH. CHIMNEY GOWL N0. 518,398. Patented Apr.17, 1894.

lNVENTO/LS WITNESSES:

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UNITED Saw-was PATENT -OFFICE.

.HERMANN FRIEDRICH AUGUST FAULHABER AND CHRISTOPH FRIEDRICH KOCH, OFSCHWABISCH HALL, GERMANY.

CHIMNEY-COWL.

SPECIFICATION forming part of Letters Patent No. 518,398, dated April17, 1894. Application filed May 4, 1892. Serial No. 481,852- (llomodel.)

To aZZ whom it mag concern.-

Be it known that we, H ERMANN FRIEDRICH AUGUST FAULHABER and CHRISTOPHFRIED- RICH KOCH, subjects of the King of Wiirtemberg, German Empire,and residents of Schwathus rendering it very difficult for the rota--tive part to turn. This drawback cannot be entirely avoided by providingthe bottom bearing with protecting casings and the like.

The object of our invention is to provide a new and improved cowl inwhich the bottom bearing for the rotative part is completely avoided,and thus the stopping of said rotative part by rust and soot is alsoavoided.

The invention consists in the combination with a cowl casing, of a tubeprojecting upward from the same, aspindle passed through the casing andtube, a collar fastenedto the spindle and resting on the top of saidtube, and a protecting casing separate from the collar and extendingsufficiently far above and below the bearing parts as to afford acomplete guard against the entrance of water and a substantialprotection against dust the rotative part of the cowl being attached tothe spindle.

The invention also consists in the construction and combination of partsand details which will be fully described hereinafter and finallypointed out in the claim.

In the accompanying drawings, Figure 1 is a vertical longitudinalsectional view of our improved chimney cowl. Fig. 2-is an enlargeddetail view of the top part, showing a modification. Fig. 3 is a similarview, showing another modification. Fig. 4: is a sectional view, on theline 4 4, of Fig. 2, showing the ball bearing, and Fig. 5 is a similarView, on the line 5 5, of Fig. 3, showing the ball bearing.

Similar letters of reference indicate corre-' sponding parts.

- tance from the end of the tube.

and three of the balls are smaller.

Thespindle A is provided at its upper end with a collar B, which restson a bearing ring L formed on the upper end of an upwardly projectingtube L fastened at its lower end to' the casing M of the cowl. The.rotative cylinder D of the cowl is fastened to the said spindle A andsuspended by means of the same from the top of the tube L. Rust and sootcannot effect the support for the said spindle and the rotatingcylinder, and thus the same can turn very freely. For the purpose ofreducing the friction still more, the ring L can be provided with agroove for receiving balls m, surrounding the upper end of the spindleand forminga ball bearing, the

collarB being provided at its under side with a groove also fitting theballs, as is shown in Figs. 2 and 3. In this manner the spindle a isguided concentrically to the tube L, and at the same time is held agreater or less dis- As shown in-Figs. 2 and 3 three of the balls arelarger The collar B is thus supported by the larger balls and thesmaller balls merely serve for holding the larger balls at the properdistance from each other. In Fig. 2 the groove for the balls is soarranged that the pressure of the balls on the ring L is vertical. InFig. 3 the grooves are so arranged that the pressure exerts itselfoutward and downward.

If the cowl is to be provided with a vane O, the same can be attachedinany suitable manner to the-top of the spindle or to the collar B, asshown in Fig. 2.

It will be seen that in both forms shown in Figs. 1 and 2 respectively,either the bearingring L and collar B are inclosed by a dustprotectingcasing 0, Fig.1, rising from the tube L, or by acasing C, Fig. 2,depending from the vane O. The casings C or O are separate from thecollar B and extendsufticiently far above and below the point of bearingas that the bearing surfaces are fully protected against dust and rain,and should the spindle A for some reason he accidentally raised withinthe tube L, the protecting casing will prevent the loss or displacementof the ballbearings, in case they are employed.

Having thus described our invention, we we claim as new and desire tosecure by Letters Patent- In a chimney-cowl, the combination with acowl-casing and an upwardly projecting tube 5 fixed thereto, at itslower end of a spindle passed through the tube and carrying the rotatlvepartof the cowl,a collar fixed to the top of the spindle and adapted toturn upon the upper end of the tube, and a protecting xo casing separatefrom said collar and extending sufficiently far above and below thebearing parts as to protect the latter against dust and rain,substantially as herein shown and described.

In testimony that we claim the foregoing as IO our invention we havesigned our names in presence of two subscribing Witnesses.

HERMANN FRIEDRICH AUGUST FAULIIABER. GHRISTOPH FRIEDRICH KOCH.Witnesses:

J OHANNES HAFELE, ERNST RiiDT.

